Create a portability header for syslog.h

Summary: Windows doesn't have it, so stub it out for now, because not getting output to the system log is a minor inconvience, not a breaking issue.

Reviewed By: yfeldblum

Differential Revision: D2977537

fb-gh-sync-id: b05d9d3c722ad4f3953a979f91024602d17d3ed0
fbshipit-source-id: b05d9d3c722ad4f3953a979f91024602d17d3ed0

folly/Makefile.am

@@ -280,6 +280,7 @@ nobase_follyinclude_HEADERS = \
 	portability/PThread.h \
 	portability/String.h \
 	portability/Strings.h \
+	portability/Syslog.h \
 	portability/SysFile.h \
 	portability/SysMman.h \
 	portability/SysResource.h \

folly/portability/Syslog.h

+/*
+ * Copyright 2016 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#ifndef _WIN32
+#include <syslog.h>
+#else
+
+#define LOG_EMERG 1
+#define LOG_ALERT 1
+#define LOG_CRIT 1
+#define LOG_ERR 4
+#define LOG_WARNING 5
+#define LOG_NOTICE 6
+#define LOG_INFO 6
+#define LOG_DEBUG 6
+
+extern "C" {
+// Do nothing for the system log for now.
+inline void openlog(const char*, int, int) {}
+inline void closelog() {}
+inline void syslog(int, const char*, ...) {}
+}
+
+#endif